LLS | KUSS| PP-01 mode – work with fuel level sensors via RS485, signal pick-up device
controller, and passenger traffic flow sensor PP-01.
To control the flow as well as fuel filling and discharge operations, the device supports operation
with external digital (RS-485 interface, 12 bit) fuel level sensors (capacitive, ultrasonic, etc.) that
support Omnicomm’s LLS protocol.
The sensors are connected to the contacts ‘20’ and ‘8’ of the main connector (see Fig. 7). Up to
eight sensors can be connected to the device at the same time (a bigger number is also possible),
which allows controlling the fuel consumption of vehicles with multiple fuel tanks. The sensors are
connected to the device in parallel.
Figure 7 – Diagram of connecting several FLSs via RS485 DUT
The device distinguishes the connected FLSs by their network address (the device polls sensors
with the addresses 01, 02, 03, 04, 05, 06, 07, and 08). Therefore, when connecting several sensors to a
single device, each sensor must have a unique network address within the range from 1 to 8 (see the
Level Sensor User Manual); the symbol rate is 19200 baud.
When configuring via the web Configurator, it is possible to configure an additional degree of filtering
inside the tracker for sensors with addresses 01-04:
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